660450045564 has 72 divisors (see below), whose sum is σ = 1682981314560. Its totient is φ = 218373948192.

The previous prime is 660450045559. The next prime is 660450045583. The reversal of 660450045564 is 465540054066.

660450045564 is a `hidden beast` number, since 6 + 6 + 0 + 45 + 0 + 0 + 45 + 564 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2765077 + ... + 2994419.

It is an arithmetic number, because the mean of its divisors is an integer number (23374740480).

Almost surely, 2^660450045564 is an apocalyptic number.

It is an amenable number.

660450045564 is an abundant number, since it is smaller than the sum of its proper divisors (1022531268996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660450045564 is a wasteful number, since it uses less digits than its factorization.

660450045564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229999 (or 229994 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

The spelling of 660450045564 in words is "six hundred sixty billion, four hundred fifty million, forty-five thousand, five hundred sixty-four".